why does my BMW 5 Series F10/F11 (2010-2017) engine hesitate during acceleration

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, multimeter, fuel pressure gauge, cleaning supplies.
• Ensure the vehicle is parked on a flat surface and the engine is off before starting the repairs.
• Disconnect the battery to avoid electrical issues during the repair.

2. Inspect and Replace Spark Plugs

• Remove the engine cover if applicable.
• Disconnect the ignition coils and remove them using the socket set.
• Remove the spark plugs using a spark plug socket.
• Inspect the old spark plugs for wear; replace with OEM-spec plugs if necessary.
• Reinstall the spark plugs and ignition coils, ensuring they are torqued to manufacturer specifications.

3. Clean or Replace Air Filter

• Locate the air filter housing and remove the cover using the socket set.
• Take out the air filter and inspect it for dirt or damage.
• Clean the air filter if reusable, or replace it with a new one.
• Reassemble the air filter housing.

4. Clean Mass Airflow Sensor (MAF)

• Locate the MAF sensor in the air intake path.
• Disconnect the electrical connector and remove the sensor from the housing.
• Use MAF cleaner to carefully clean the sensor elements.
• Reinstall the MAF sensor and reconnect the electrical connector.

5. Check and Adjust Fuel Pressure

• Connect the fuel pressure gauge to the fuel rail's test port.
• Start the engine and observe the fuel pressure; it should meet manufacturer specifications.
• If pressure is low, inspect and replace the fuel pump or fuel filter as needed.

6. Verify Throttle Position Sensor Function

• Locate the TPS on the throttle body and disconnect the electrical connector.
• Use a multimeter to check the resistance across the sensor terminals while moving the throttle.
• Replace the TPS if readings are inconsistent or out of specifications.